I have testicular cancer and kidney cancer. chance the cancer will come back somewhere else in me?

Possible: Kidney cancer is usually curable when detected at an early stage and is still confined to the kidney. Testicular cancer is curable in the majority of cases. The fact that you had 2 different cancers puts you at risk for a third one especially if you received chemo for testicular cancer. Clinical surveillance and consistent follow up with your physician is prudent.